- It is generally believed that Howard Hawks took over direction during production, and it has always been acknowledged by director Christian Nyby that Hawks was the guiding hand.
- Partly filmed in Glacier National Park and at a Los Angeles ice storage plant.
- This film was based on the short story "Who Goes There?" by Don A. Stuart. The credits on this film list the author by his real name, the science fiction editor/writer John W. Campbell, Jr.
- Midget actor 'Billy Curtis' played the smaller version of "The Thing" during the creature's final scene.
- James Arness complained that his "Thing" costume made him look like a giant carrot.
- Howard Hawks asked the US Air Force for assistance in making the film. But he was refused because the top brass felt that such co-operation would compromise the official stance that UFOs didn't exist.
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